This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 25 |
| 3 | 95 |
| 4 | 295 |
| 5 | 791 |
| 6 | 1897 |
| 7 | 4166 |
| 8 | 8518 |
| 9 | 16414 |
| 10 | 30086 |
| 11 | 52834 |
| 12 | 89402 |
| 13 | 146446 |
| 14 | 233108 |
| 15 | 361711 |
| 16 | 548591 |
| 17 | 815083 |
| 18 | 1188679 |
| 19 | 1704377 |
| 20 | 2406241 |
| 21 | 3349193 |
| 22 | 4601059 |
| 23 | 6244892 |
| 24 | 8381596 |
| 25 | 11132876 |
| 26 | 14644540 |
| 27 | 19090180 |
| 28 | 24675260 |
| 29 | 31641640 |
| 30 | 40272566 |
| 31 | 50898157 |